This paper provides a general overview of the landscape, terrain, hillslope processes and fluvial processes found within the general area of a proposed pipeline corridor across west central B.C. The geology and geomorphology of the area is complex and destructive landslides are common. The northwest trending rugged topography poses serious challenges for pipeline development. Only certain valleys and passes are suitable for east–west oriented infrastructure. The terrain across west central B.C., with steep unstable rock masses and weak soils, places considerable constraints on pipeline development.
The intent of this paper is to help formulate discussion, encourage more in-depth study, direct more detailed on-the-ground investigation, and stimulate investigation into possible safer alternative routes to the unstable terrain found in west central B.C. This paper does not discuss environmental consequences and risk associated with the proposed pipelines although the environmental consequences of an oil pipeline break do differ considerably from a break sustained by a natural gas pipeline. The proposed corridor crosses three distinct physiographic units: the Nechako Plateau, the Hazelton Mountains, and the Kitimat Ranges. These units are distinct topographically as reflected in present day landforms, erosion, and landslides, and thus present different hazards to a pipeline.
